modelSmartFridgeFreezer
Model with fixed relation for some parameters
Extends from TransiEnt.Basics.Icons.Model (Icon for models).
Information
1. Purpose of model
Model of a smart controlled fridge and freezer with fixed relation for some parameters. Full documentation is not available yet. Please see comments in code or contact author per mail.
2. Level of detail, physical effects considered, and physical insight
(no remarks)
3. Limits of validity
(no remarks)
4. Interfaces
epp - Electric Power Port
5. Nomenclature
(no remarks)
6. Governing Equations
(no remarks)
7. Remarks for Usage
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8. Validation
Tested in check model "TransiEnt.Consumer.DemandSideManagement.FridgePoolControl.Check.TestSmartFridgeFreezer"
9. References
(no remarks)
10. Version History
Model created by Pascal Dubucq (dubucq@tuhh.de) on 01.10.2014
Quality check (Code conventions) by Rebekka Denninger on 01.10.2016
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Temperature | T_amb | 295.65 | Ambient temperature |
| SI.Mass | mG | m_freezer_over_m_fridge*m_fridge | |
| SI.Temperature | T_freezer_start | T_fridge_start - 25 | |
| SI.Power | P_el_n | P_over_m_fridge*m_fridge | |
| SI.Area | A_fridge | A_fridge_over_m_fridge*m_fridge | |
| SI.Area | A_freezer | A_freezer_over_m_fridge*m_fridge | |
| SI.Area | A_fridge2freezer | A_fridgefreezer_over_m_fridge*m_fridge | |
| SI.CoefficientOfHeatTransfer | k_freezer2ambient | k_freezer2ambient_over_k_fridge2ambient*k_fridge2ambient | |
| SI.CoefficientOfHeatTransfer | k_fridge2freezer | k_fridge2freezer_over_k_fridge2ambient*k_fridge2ambient | |
| Varying parameters typically depending on fridge freezer model and content | |||
| SI.Mass | m_fridge | 8 | Mass of fridge (used as scaling parameter) |
| Real | m_freezer_over_m_fridge | 1 | Mass of freezer (including content) over mass of fridge (including content) |
| SI.SpecificHeatCapacity | cp_fridge | 3000 | Specific heat capacity of fridge (including content) |
| SI.SpecificHeatCapacity | cp_freezer | 2500 | Specific heat capacity of freezer (including content) |
| Real | COP | 1.216 | Expected value of coefficient of performance of cooling unit |
| SI.Temperature | T_fridge_start | 281.45 | Temperature of fridge at init |
| SI.CoefficientOfHeatTransfer | k_fridge2ambient | 0.527 | Coefficient of heat transfer between fridge and ambient |
| Typical fractions (can be assumed constant for most residential fridge/freezers) | |||
| Real | P_over_m_fridge | 13.125 | Nominal electric power of cooling unit over mass of fridge(including content) |
| Real | x_fridge | 0.3862 | Fraction of electric demand caused by fridge over total electric demand |
| Real | A_fridge_over_m_fridge | 0.2991 | Fraction of heat transfer surface of fridge to ambient over mass of fridge |
| Real | A_freezer_over_m_fridge | 0.2441 | Fraction of heat transfer surface of freezer to ambient over mass of fridge |
| Real | A_fridgefreezer_over_m_fridge | 0.0379 | Fraction of heat transfer surface between fridge and freezer to ambient over mass of fridge |
| Real | k_freezer2ambient_over_k_fridge2ambient | 0.4469 | Coefficient of heat transfer between freezer and ambient divided by Coefficient of heat transfer between fridge and ambient |
| Real | k_fridge2freezer_over_k_fridge2ambient | 1.0560 | Coefficient of heat transfer between fridge and freezer divided by Coefficient of heat transfer between fridge and ambient |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Basics.Interfaces.Electrical.ActivePowerPort | epp |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Modelica.Thermal.HeatTransfer.Sources.PrescribedTemperature | ambient | ||
| Modelica.Thermal.HeatTransfer.Components.HeatCapacitor | controlVolumeFridge | ||
| Modelica.Thermal.HeatTransfer.Components.ThermalConductor | heatconductionAmbientFridge | ||
| Modelica.Thermal.HeatTransfer.Sensors.TemperatureSensor | temperatureSensor | ||
| Modelica.Thermal.HeatTransfer.Components.HeatCapacitor | controlVolumeFreezer | ||
| Modelica.Thermal.HeatTransfer.Components.ThermalConductor | heatconductionAmbientFreezer | ||
| Modelica.Thermal.HeatTransfer.Components.ThermalConductor | heatconductionFridgeToFreezer | ||
| Controller.ENTSOEThermostat | thermostat | ||
| Base.CoolingUnit2ports | heatpump | ||
| Modelica.Blocks.Sources.Constant | Tu | ||
| Modelica.Units.SI.Temperature | T | temperatureSensor.T | |
| Real | T_star | (T - (thermostat.T_set - thermostat.delta/2))./thermostat.delta | |
| Real | SOC | 1 - T_star |